Anyone ever adjust the yoke on a 1970’s Sony trinitron?
So I have a 1974-75ish Sony KV-9200 color Trinitron TV and I need to rotate the yoke a little because the image is crooked. I removed the rubber wedges but the yoke won’t budge. I decided to walk away for a few hours and just took another look and I did just notice there is a small clamp on the end of the tube neck that could be loosened up, but before I do that I was wondering if that is what it’s intended for to hold the yoke in place against the rubber wedges? I don’t want to have to adjust the convergence so I haven’t loosed it yet just Incase that is wrong. I’m also worried because the neck is the most fragile part of the tube and don’t want to break it. This is all I have left to do on this TV. I replaced every electrolytic cap, adjusted b+, cleaned all the controls and refreshed the entire exterior. Any advise would be helpful. Thanks, Corey corey cohen uǝɥoɔ ʎǝɹoɔ Sent from my iPhone
If you're on FB, there's a group called the CRT Collective that specializes in things like this. https://www.facebook.com/groups/444560212348840/ --MS On Saturday, January 5, 2019, 4:00:01 PM EST, corey cohen via vcf-midatlantic <vcf-midatlantic@lists.vcfed.org> wrote: So I have a 1974-75ish Sony KV-9200 color Trinitron TV and I need to rotate the yoke a little because the image is crooked. I removed the rubber wedges but the yoke won’t budge. I decided to walk away for a few hours and just took another look and I did just notice there is a small clamp on the end of the tube neck that could be loosened up, but before I do that I was wondering if that is what it’s intended for to hold the yoke in place against the rubber wedges? I don’t want to have to adjust the convergence so I haven’t loosed it yet just Incase that is wrong. I’m also worried because the neck is the most fragile part of the tube and don’t want to break it. This is all I have left to do on this TV. I replaced every electrolytic cap, adjusted b+, cleaned all the controls and refreshed the entire exterior. Any advise would be helpful. Thanks, Corey corey cohen uǝɥoɔ ʎǝɹoɔ Sent from my iPhone
Corey, Put the rubber wedges back in place. They are there to keep the yoke positioned properly front to back on the tube. Loosen the screw then the yoke should rotate. Square the image up on the screen. Then tighten the screw again, just slightly more then snug. You may have to slightly touch up the H-Stat convergence, which should be on the flyback along with focus. Sent from my iPhone
On Jan 5, 2019, at 3:59 PM, corey cohen via vcf-midatlantic <vcf-midatlantic@lists.vcfed.org> wrote:
So I have a 1974-75ish Sony KV-9200 color Trinitron TV and I need to rotate the yoke a little because the image is crooked. I removed the rubber wedges but the yoke won’t budge. I decided to walk away for a few hours and just took another look and I did just notice there is a small clamp on the end of the tube neck that could be loosened up, but before I do that I was wondering if that is what it’s intended for to hold the yoke in place against the rubber wedges? I don’t want to have to adjust the convergence so I haven’t loosed it yet just Incase that is wrong. I’m also worried because the neck is the most fragile part of the tube and don’t want to break it.
This is all I have left to do on this TV. I replaced every electrolytic cap, adjusted b+, cleaned all the controls and refreshed the entire exterior.
Any advise would be helpful. Thanks, Corey
corey cohen uǝɥoɔ ʎǝɹoɔ Sent from my iPhone
So the clamp and screw on the back of the tube where it’s the skinny part of the neck is correct for rotating the yoke? I could swear the other TVs/monitors I have adjusted had them near the top of the tube where it’s much thicker. Then again none of them were Sony. I also put the rubber wedges back in. I guess it was a good opportunity to replace the foam adhesive tape. Cheers, Corey corey cohen uǝɥoɔ ʎǝɹoɔ Sent from my iPhone
On Jan 5, 2019, at 4:52 PM, Matt Patoray via vcf-midatlantic <vcf-midatlantic@lists.vcfed.org> wrote:
Corey, Put the rubber wedges back in place. They are there to keep the yoke positioned properly front to back on the tube. Loosen the screw then the yoke should rotate. Square the image up on the screen. Then tighten the screw again, just slightly more then snug.
You may have to slightly touch up the H-Stat convergence, which should be on the flyback along with focus.
Sent from my iPhone
On Jan 5, 2019, at 3:59 PM, corey cohen via vcf-midatlantic <vcf-midatlantic@lists.vcfed.org> wrote:
So I have a 1974-75ish Sony KV-9200 color Trinitron TV and I need to rotate the yoke a little because the image is crooked. I removed the rubber wedges but the yoke won’t budge. I decided to walk away for a few hours and just took another look and I did just notice there is a small clamp on the end of the tube neck that could be loosened up, but before I do that I was wondering if that is what it’s intended for to hold the yoke in place against the rubber wedges? I don’t want to have to adjust the convergence so I haven’t loosed it yet just Incase that is wrong. I’m also worried because the neck is the most fragile part of the tube and don’t want to break it.
This is all I have left to do on this TV. I replaced every electrolytic cap, adjusted b+, cleaned all the controls and refreshed the entire exterior.
Any advise would be helpful. Thanks, Corey
corey cohen uǝɥoɔ ʎǝɹoɔ Sent from my iPhone
The yoke is held by the clamp yes. The convergence will be affected by removing the wedges. They are used to tweak the purity (of red) and convergence. If you move the yoke at all the convergence and possibly purity will be changed. It my take some time but you should be able to " get it back". You could bring it to the workshop Plenty of people to help I'm sure. Mike R. Sent from: My extremely complicated, hand held electronic device.
On Jan 5, 2019, at 3:59 PM, corey cohen via vcf-midatlantic <vcf-midatlantic@lists.vcfed.org> wrote:
So I have a 1974-75ish Sony KV-9200 color Trinitron TV and I need to rotate the yoke a little because the image is crooked. I removed the rubber wedges but the yoke won’t budge. I decided to walk away for a few hours and just took another look and I did just notice there is a small clamp on the end of the tube neck that could be loosened up, but before I do that I was wondering if that is what it’s intended for to hold the yoke in place against the rubber wedges? I don’t want to have to adjust the convergence so I haven’t loosed it yet just Incase that is wrong. I’m also worried because the neck is the most fragile part of the tube and don’t want to break it.
This is all I have left to do on this TV. I replaced every electrolytic cap, adjusted b+, cleaned all the controls and refreshed the entire exterior.
Any advise would be helpful. Thanks, Corey
corey cohen uǝɥoɔ ʎǝɹoɔ Sent from my iPhone
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